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爬虫之JSON案例

糗事百科实例:

爬取糗事百科段子,假设页面的URL是 http://www.qiushibaike.com/8hr/page/1

要求:

  1. 使用requests获取页面信息,用XPath / re 做数据提取

  2. 获取每个帖子里的用户头像链接用户姓名段子内容点赞次数评论次数

  3. 保存到 json 文件内

参考代码

#qiushibaike.py

#import urllib
#import re
#import chardet

import requests
from lxml import etree

page = 1
url = ‘http://www.qiushibaike.com/8hr/page/‘ + str(page) 
headers = {
    ‘User-Agent‘: ‘Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36‘,
    ‘Accept-Language‘: ‘zh-CN,zh;q=0.8‘}

try:
    response = requests.get(url, headers=headers)
    resHtml = response.text

    html = etree.HTML(resHtml)
    result = html.xpath(‘//div[contains(@id,"qiushi_tag")]‘)

    for site in result:
        item = {}

        imgUrl = site.xpath(‘./div/a/img/@src‘)[0].encode(‘utf-8‘)
        username = site.xpath(‘./div/a/@title‘)[0].encode(‘utf-8‘)
        #username = site.xpath(‘.//h2‘)[0].text
        content = site.xpath(‘.//div[@class="content"]/span‘)[0].text.strip().encode(‘utf-8‘)
        # 投票次数
        vote = site.xpath(‘.//i‘)[0].text
        #print site.xpath(‘.//*[@class="number"]‘)[0].text
        # 评论信息
        comments = site.xpath(‘.//i‘)[1].text

        print imgUrl, username, content, vote, comments

except Exception, e:
    print e

演示效果

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爬虫之JSON案例